My dkh was 6 four days ago and been trying to get it up all my corals have been looking ok just that I have had my tank for 7 months with no growth but I have never dosed and thing except redsea coraline grow

Just want to know if the parameters r ok?
Any tips?
What can I do for growth?

My dkh was 6 four days ago and been trying to get it up all my corals have been looking ok just that I have had my tank for 7 months with no growth but I have never dosed and thing except redsea coraline grow

Just want to know if the parameters r ok?
Any tips?
What can I do for growth?